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sattari [20]
3 years ago
9

Even though fossils of life that existed 3-3.5 billion years

Biology
1 answer:
pogonyaev3 years ago
5 0

Answer:

Fossils are the remains of ancient plants and animals that were buried millions of years back. These are found to be embedded in the sedimentary types of rocks. The earliest known direct fossils are not obtained in the present day, but the imprints of these fossils are explored in many of the places. These were the ancient micro-fossils such as bacterias, cyanobacteria that existed about 3.5 billion years back.

Some of the direct evidence of fossils are obtained from the rocks in the western part of Australia and the southwestern part of Greenland.

Thus, the imprints of these fossils are found in many rocks at different places, and this suggests the existence of life during that particular time frame.

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Jermaine was hiking in the rocky mountains for the first time and became sick. At the hospital, he was diagnosed with sickle-cel
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Sickle cell disorder is an inherited blood disease featured by defective hemoglobin. The condition affects the hemoglobin, or the red blood cells, and their tendency to conduct oxygen. The normal hemoglobin cells are round, smooth, and flexible, and thus, they can travel via the vessels in the body effortlessly.  

On the other hand, the sickle cell hemoglobin cells are sticky and stiff and form a sickle, C shape, when they lose their oxygen. These cells combine together, and cannot effortlessly move through the blood vessels.  


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3 years ago
​short chains of glucose units that result from starch breakdown are called ____.
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They are called, glycogen...
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djverab [1.8K]
The answer is A. P-waves : )
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3 years ago
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Which of the following is true of active transport?
denpristay [2]

Answer:

D. Molecules called pumps function to control active transport.

Explanation:

Active transport is one of the two types of transport (the other being passive transport). It is the type of transport in which substances move against their concentration gradient i.e. from a lower concentration to a higher concentration. Hence, due to this, energy input in form of ATP is required by the cell.

However, the process of active transport makes use of certain molecules called PUMPS to control it. The pumps moves ions/molecules against their concentration gradient. An example is the sodium-pottasium pump which moves sodium ions from a region of low conc. to a region of high conc.

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2 years ago
Macromolecules and Carbohydrates
zvonat [6]

Answer:

Explanation:The large molecules necessary for life that are built from smaller organic molecules are called biological macromolecules. There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions. Combined, these molecules make up the majority of a cell’s mass. Biological macromolecules are organic, meaning that they contain carbon. In addition, they may contain hydrogen, oxygen, nitrogen, phosphorus, sulfur, and additional minor elements.

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It is often said that life is “carbon-based.” This means that carbon atoms, bonded to other carbon atoms or other elements, form the fundamental components of many, if not most, of the molecules found uniquely in living things. Other elements play important roles in biological molecules, but carbon certainly qualifies as the “foundation” element for molecules in living things. It is the bonding properties of carbon atoms that are responsible for its important role

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